Brook was set to make the third defence of his belt against the dangerous Argentine, but having spent time in hospital with the injury and taking the advice of medical experts following scans, the Sheffield star will now look to face Chaves later in the year.

“It’s always a bitter blow when an injury causes a fight to be postponed, especially so close to the event,” said promoter Eddie Hearn. “Kell picked up a rib injury in sparring yesterday and spent most of the day at hospital yesterday. Kell was desperate to fight but it was simply impossible and we will now look to reschedule the bout for the end of the year.”

Matchroom Boxing will make a full statement on Monday regarding details of full refunds and partial refunds to those fans still attending the show.